Passive methane oxidation biosystems for long term mitigation of fugitive emissions from old landfills

用于长期减少旧垃圾填埋场无组织排放的被动甲烷氧化生物系统

• 批准号: 548667-2019
• 负责人: Cabral, Alexandre
• 金额: $ 7.51万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=700602
• 关键词: Passive; methane; oxidation; biosystems; long

According to Canada's 2015 Greenhouse Gas Inventory, 19 Megatonnes (Mt) of carbon dioxide equivalent, out of the 30 Mt generated by Canadian landfills were ultimately emitted, some escaping to the atmosphere in the form of fugitive - or uncontrolled - methane (CH4) emissions. Landfill emissions can continue for decades after biogas extraction systems reach end-of-life or have been turned off. Successful land reclamation projects, such as turning an old landfill into a park, depends of passive, low-maintenance, technologies that can cope with these emissions. The main goal of this research is to apply the design procedure developed by the PI, which takes into consideration the hydraulic behaviour of passive methane oxidation biosystem (PMOB), to construct and monitor a pilot-scale PMOB at the old Kitchener landfill, recently turned into a park (McLennan municipal park). Our main hypothesis is that this design methodology, with inclusion of recent design recommendations adopted in Europe, will lead to an effective PMOB that is capable of abating the methane fugitive emissions that presently reach the surface of the Kitchener landfill to an acceptable level. This design methodology is based mainly on the hydraulic properties of the PMOB and how they can affect gas migration within un unsaturated porous media. Lack of attention to it, may lead to high methane loadings, i.e., high surface fluxes or hotspots. The novelty of this project is that it will be the first where a PMOB will be designed with formal consideration of unsaturated flow of water and gas. The documentation of the effectiveness of this pilot-scale PMOB will be instrumental in helping the Region Municipality of Waterloo (RMW) and its consultant, GHD, develop a long-term, durable, strategy to abate methane emissions at the Kitchener landfill and other landfills under the responsibility of the RMW. Ultimately, our team aims at proposing a low-maintenance, high impact technology to abate landfill emissions that could be applied by landfill designers and operators across Canada.

根据加拿大 2015 年温室气体清单，加拿大垃圾填埋场产生的 30 吨二氧化碳最终排放了 19 兆吨 (Mt) 二氧化碳当量，其中一些以逃逸或不受控制的甲烷 (CH4) 排放形式逃逸到大气中。 在沼气提取系统报废或关闭后，垃圾填埋场的排放可能会持续数十年。成功的土地复垦项目，例如将旧垃圾填埋场改造成公园，依赖于被动、低维护的技术来应对这些排放。 本研究的主要目标是应用 PI 开发的设计程序，该程序考虑了被动甲烷氧化生物系统 (PMOB) 的水力行为，在旧基奇纳垃圾填埋场建造并监测中试规模的 PMOB，该垃圾填埋场最近已转变为进入公园（麦克伦南市政公园）。我们的主要假设是，这种设计方法，加上欧洲最近采用的设计建议，将产生有效的 PMOB，能够将目前到达基奇纳垃圾填埋场表面的甲烷逃逸排放量减少到可接受的水平。该设计方法主要基于 PMOB 的水力特性以及它们如何影响不饱和多孔介质内的气体运移。缺乏对此的关注，可能会导致高甲烷负荷，即高表面通量或热点。该项目的新颖之处在于，它将是第一个在设计 PMOB 时正式考虑水和气体的不饱和流动的项目。 该试点规模 PMOB 有效性的记录将有助于帮助滑铁卢地区市政府 (RMW) 及其顾问 GHD 制定长期、持久的战略，以减少基奇纳垃圾填埋场和其他垃圾填埋场的甲烷排放由 RMW 负责。最终，我们团队的目标是提出一种低维护、高影响的技术来减少垃圾填埋场排放，加拿大各地的垃圾填埋场设计者和运营商可以应用该技术。